Home / 305,340-645,126

Finding the Third Proportional to 305,340 and 645,126

Calculator

Solution

The third proportional to 305,340 and 645,126 is: 1,363,029.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,340 : 645,126 = 645,126 : x
  2. Step 2: Convert to fraction form
    305,340/645,126 = 645,126/x
  3. Step 3: Cross multiply
    305,340x = 645,126 × 645,126
  4. Step 4: Simplify right side
    305,340x = 416,187,555,876
  5. Step 5: Solve for x
    x = 416,187,555,876/305,340
  6. Step 6: Final answer
    x = 1,363,029.92

Related Problems

Find third proportional to 152,670 and 322,563
Half scale
Find third proportional to 610,680 and 1,290,252
Double scale
Find third proportional to 305,342 and 645,130
Similar ratio
Find third proportional to 458,010 and 967,689
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.